March for Trayvon

Demonstrators gather on July 20, 2013 in Los Angeles as part of a nationwide rally to honor slained Florida teen Trayvon Martin. Civil rights groups mobilized for protests in cities across the United States on Saturday amid charged emotions over the not-guilty verdict in the shooting death of the unarmed Martin. George Zimmerman, who said he acted in self defense, was acquitted of fatally shooting Martin in the chest on the rainy night of February 26, 2012, during an altercation in a gated community in Sanford, Florida

Demonstrators gather on July 20, 2013 in Los Angeles as part of a nationwide rally to honor slained Florida teen Trayvon Martin. Civil rights groups mobilized for protests in cities across the United States on Saturday amid charged emotions over the not-guilty verdict in the shooting death of the unarmed Martin. George Zimmerman, who said he acted in self defense, was acquitted of fatally shooting Martin in the chest on the rainy night of February 26, 2012, during an altercation in a gated community in Sanford, Florida (FREDERIC J. BROWN, AFPGetty Images)

Demonstrators gather on July 20, 2013 in Los Angeles as part of a nationwide rally to honor slained Florida teen Trayvon Martin. Civil rights groups mobilized for protests in cities across the United States on Saturday amid charged emotions over the not-guilty verdict in the shooting death of the unarmed Martin. George Zimmerman, who said he acted in self defense, was acquitted of fatally shooting Martin in the chest on the rainy night of February 26, 2012, during an altercation in a gated community in Sanford, FloridaFREDERIC J. BROWN, AFPGetty Images